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- /* ns32k.c -- Assemble on the National Semiconductor 32k series
- Copyright (C) 1987 Free Software Foundation, Inc.
-
- This file is part of GAS, the GNU Assembler.
-
- GAS is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 1, or (at your option)
- any later version.
-
- GAS is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GAS; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #define NS32K
- /*#define SHOW_NUM 1*/ /* uncomment for debugging */
-
- #include <stdio.h>
- #include <ctype.h>
- #ifdef USG
- #include <string.h>
- #else
- #include <strings.h>
- #endif
- #include "ns32k-opcode.h"
- #include "as.h"
- #include "obstack.h"
- #include "frags.h"
- #include "struc-symbol.h"
- #include "flonum.h"
- #include "expr.h"
- #include "md.h"
- #include "hash.h"
- #include "write.h"
- #include "symbols.h"
-
- /* Macros */
- #define IIF_ENTRIES 13 /* number of entries in iif */
- #define PRIVATE_SIZE 256 /* size of my garbage memory */
- #define MAX_ARGS 4
- #define DEFAULT -1 /* addr_mode returns this value when plain constant or label is encountered */
-
- #define IIF(ptr,a1,c1,e1,g1,i1,k1,m1,o1,q1,s1,u1) \
- iif.iifP[ptr].type= a1; \
- iif.iifP[ptr].size= c1; \
- iif.iifP[ptr].object= e1; \
- iif.iifP[ptr].object_adjust= g1; \
- iif.iifP[ptr].pcrel= i1; \
- iif.iifP[ptr].pcrel_adjust= k1; \
- iif.iifP[ptr].im_disp= m1; \
- iif.iifP[ptr].relax_substate= o1; \
- iif.iifP[ptr].bit_fixP= q1; \
- iif.iifP[ptr].addr_mode= s1; \
- iif.iifP[ptr].bsr= u1;
-
- #ifdef SEQUENT_COMPATABILITY
- #define LINE_COMMENT_CHARS "|"
- #define ABSOLUTE_PREFIX '@'
- #define IMMEDIATE_PREFIX '#'
- #endif
-
- #ifndef LINE_COMMENT_CHARS
- #define LINE_COMMENT_CHARS "#"
- #endif
-
- char comment_chars[] = "#";
- char line_comment_chars[] = LINE_COMMENT_CHARS;
- #if !defined(ABSOLUTE_PREFIX) && !defined(IMMEDIATE_PREFIX)
- #define ABSOLUTE_PREFIX '@' /* One or the other MUST be defined */
- #endif
-
- struct addr_mode {
- char mode; /* addressing mode of operand (0-31) */
- char scaled_mode; /* mode combined with scaled mode */
- char scaled_reg; /* register used in scaled+1 (1-8) */
- char float_flag; /* set if R0..R7 was F0..F7 ie a floating-point-register */
- char am_size; /* estimated max size of general addr-mode parts*/
- char im_disp; /* if im_disp==1 we have a displacement */
- char pcrel; /* 1 if pcrel, this is really redundant info */
- char disp_suffix[2]; /* length of displacement(s), 0=undefined */
- char *disp[2]; /* pointer(s) at displacement(s)
- or immediates(s) (ascii) */
- char index_byte; /* index byte */
- };
- typedef struct addr_mode addr_modeS;
-
-
- char *freeptr,*freeptr_static; /* points at some number of free bytes */
- struct hash_control *inst_hash_handle;
-
- struct ns32k_opcode *desc; /* pointer at description of instruction */
- addr_modeS addr_modeP;
- char EXP_CHARS[] = "eE";
- char FLT_CHARS[] = "fd"; /* we don't want to support lowercase, do we */
- long omagic = OMAGIC;
- void md_number_to_disp();
- void md_number_to_imm();
- segT evaluate_expr();
- void fix_new_ns32k();
-
- /* UPPERCASE denotes live names
- * when an instruction is built, IIF is used as an intermidiate form to store
- * the actual parts of the instruction. A ns32k machine instruction can
- * be divided into a couple of sub PARTs. When an instruction is assembled
- * the appropriate PART get an assignment. When an IIF has been completed it's
- * converted to a FRAGment as specified in AS.H */
-
- /* internal structs */
- struct option {
- char *pattern;
- unsigned long or;
- unsigned long and;
- };
-
- typedef struct {
- int type; /* how to interpret object */
- int size; /* Estimated max size of object */
- unsigned long object; /* binary data */
- int object_adjust; /* number added to object */
- int pcrel; /* True if object is pcrel */
- int pcrel_adjust; /* It's value reflects the length in bytes from the instruction start to the displacement */
- int im_disp; /* True if the object is a displacement */
- relax_substateT relax_substate; /* Initial relaxsubstate */
- bit_fixS *bit_fixP; /* Pointer at bit_fix struct */
- int addr_mode; /* What addrmode do we associate with this iif-entry */
- char bsr; /* Sequent hack */
- }iif_entryT; /* Internal Instruction Format */
- struct int_ins_form {
- int instr_size; /* Max size of instruction in bytes. */
- iif_entryT iifP[IIF_ENTRIES+1];
- };
- struct int_ins_form iif;
- expressionS exprP;
- char *input_line_pointer;
- /* description of the PARTs in IIF
- *object[n]:
- * 0 total length in bytes of entries in iif
- * 1 opcode
- * 2 index_byte_a
- * 3 index_byte_b
- * 4 disp_a_1
- * 5 disp_a_2
- * 6 disp_b_1
- * 7 disp_b_2
- * 8 imm_a
- * 9 imm_b
- * 10 implied1
- * 11 implied2
- *
- * For every entry there is a datalength in bytes. This is stored in size[n].
- * 0, the objectlength is not explicitly given by the instruction
- * and the operand is undefined. This is a case for relaxation.
- * Reserve 4 bytes for the final object.
- *
- * 1, the entry contains one byte
- * 2, the entry contains two bytes
- * 3, the entry contains three bytes
- * 4, the entry contains four bytes
- * etc
- *
- * Furthermore, every entry has a data type identifier in type[n].
- *
- * 0, the entry is void, ignore it.
- * 1, the entry is a binary number.
- * 2, the entry is a pointer at an expression.
- * Where expression may be as simple as a single '1',
- * and as complicated as foo-bar+12,
- * foo and bar may be undefined but suffixed by :{b|w|d} to
- * control the length of the object.
- *
- * 3, the entry is a pointer at a bignum struct
- *
- *
- * The low-order-byte coresponds to low physical memory.
- * Obviously a FRAGment must be created for each valid disp in PART whose
- * datalength is undefined (to bad) .
- * The case where just the expression is undefined is less severe and is
- * handled by fix. Here the number of bytes in the objectfile is known.
- * With this representation we simplify the assembly and separates the
- * machine dependent/independent parts in a more clean way (said OE)
- */
-
- struct option opt1[]= /* restore, exit */
- {
- { "r0", 0x80, 0xff },
- { "r1", 0x40, 0xff },
- { "r2", 0x20, 0xff },
- { "r3", 0x10, 0xff },
- { "r4", 0x08, 0xff },
- { "r5", 0x04, 0xff },
- { "r6", 0x02, 0xff },
- { "r7", 0x01, 0xff },
- { 0 , 0x00, 0xff }
- };
- struct option opt2[]= /* save, enter */
- {
- { "r0", 0x01, 0xff },
- { "r1", 0x02, 0xff },
- { "r2", 0x04, 0xff },
- { "r3", 0x08, 0xff },
- { "r4", 0x10, 0xff },
- { "r5", 0x20, 0xff },
- { "r6", 0x40, 0xff },
- { "r7", 0x80, 0xff },
- { 0 , 0x00, 0xff }
- };
- struct option opt3[]= /* setcfg */
- {
- { "c", 0x8, 0xff },
- { "m", 0x4, 0xff },
- { "f", 0x2, 0xff },
- { "i", 0x1, 0xff },
- { 0 , 0x0, 0xff }
- };
- struct option opt4[]= /* cinv */
- {
- { "a", 0x4, 0xff },
- { "i", 0x2, 0xff },
- { "d", 0x1, 0xff },
- { 0 , 0x0, 0xff }
- };
- struct option opt5[]= /* string inst */
- {
- { "b", 0x2, 0xff },
- { "u", 0xc, 0xff },
- { "w", 0x4, 0xff },
- { 0 , 0x0, 0xff }
- };
- struct option opt6[]= /* plain reg ext,cvtp etc */
- {
- { "r0", 0x00, 0xff },
- { "r1", 0x01, 0xff },
- { "r2", 0x02, 0xff },
- { "r3", 0x03, 0xff },
- { "r4", 0x04, 0xff },
- { "r5", 0x05, 0xff },
- { "r6", 0x06, 0xff },
- { "r7", 0x07, 0xff },
- { 0 , 0x00, 0xff }
- };
-
- #if !defined(NS32032) && !defined(NS32532)
- #define NS32032
- #endif
-
- struct option cpureg_532[]= /* lpr spr */
- {
- { "us", 0x0, 0xff },
- { "dcr", 0x1, 0xff },
- { "bpc", 0x2, 0xff },
- { "dsr", 0x3, 0xff },
- { "car", 0x4, 0xff },
- { "fp", 0x8, 0xff },
- { "sp", 0x9, 0xff },
- { "sb", 0xa, 0xff },
- { "usp", 0xb, 0xff },
- { "cfg", 0xc, 0xff },
- { "psr", 0xd, 0xff },
- { "intbase", 0xe, 0xff },
- { "mod", 0xf, 0xff },
- { 0 , 0x00, 0xff }
- };
- struct option mmureg_532[]= /* lmr smr */
- {
- { "mcr", 0x9, 0xff },
- { "msr", 0xa, 0xff },
- { "tear", 0xb, 0xff },
- { "ptb0", 0xc, 0xff },
- { "ptb1", 0xd, 0xff },
- { "ivar0", 0xe, 0xff },
- { "ivar1", 0xf, 0xff },
- { 0 , 0x0, 0xff }
- };
-
- struct option cpureg_032[]= /* lpr spr */
- {
- { "upsr", 0x0, 0xff },
- { "fp", 0x8, 0xff },
- { "sp", 0x9, 0xff },
- { "sb", 0xa, 0xff },
- { "psr", 0xd, 0xff },
- { "intbase", 0xe, 0xff },
- { "mod", 0xf, 0xff },
- { 0 , 0x0, 0xff }
- };
- struct option mmureg_032[]= /* lmr smr */
- {
- { "bpr0", 0x0, 0xff },
- { "bpr1", 0x1, 0xff },
- { "pf0", 0x4, 0xff },
- { "pf1", 0x5, 0xff },
- { "sc", 0x8, 0xff },
- { "msr", 0xa, 0xff },
- { "bcnt", 0xb, 0xff },
- { "ptb0", 0xc, 0xff },
- { "ptb1", 0xd, 0xff },
- { "eia", 0xf, 0xff },
- { 0 , 0x0, 0xff }
- };
-
- #if defined(NS32532)
- struct option *cpureg = cpureg_532;
- struct option *mmureg = mmureg_532;
- #else
- struct option *cpureg = cpureg_032;
- struct option *mmureg = mmureg_032;
- #endif
-
-
- const pseudo_typeS md_pseudo_table[]={ /* so far empty */
- { 0, 0, 0 }
- };
-
- #define IND(x,y) (((x)<<2)+(y))
-
- /* those are index's to relax groups in md_relax_table
- ie it must be multiplied by 4 to point at a group start. Viz IND(x,y)
- Se function relax_segment in write.c for more info */
-
- #define BRANCH 1
- #define PCREL 2
-
- /* those are index's to entries in a relax group */
-
- #define BYTE 0
- #define WORD 1
- #define DOUBLE 2
- #define UNDEF 3
- /* Those limits are calculated from the displacement start in memory.
- The ns32k uses the begining of the instruction as displacement base.
- This type of displacements could be handled here by moving the limit window
- up or down. I choose to use an internal displacement base-adjust as there
- are other routines that must consider this. Also, as we have two various
- offset-adjusts in the ns32k (acb versus br/brs/jsr/bcond), two set of limits
- would have had to be used.
- Now we dont have to think about that. */
-
-
- const relax_typeS md_relax_table[]={
- { 1, 1, 0, 0 },
- { 1, 1, 0, 0 },
- { 1, 1, 0, 0 },
- { 1, 1, 0, 0 },
-
- { (63), (-64), 1, IND(BRANCH,WORD) },
- { (8192), (-8192), 2, IND(BRANCH,DOUBLE) },
- { 0, 0, 4, 0 },
- { 1, 1, 0, 0 }
- };
-
- /* Array used to test if mode contains displacements.
- Value is true if mode contains displacement. */
-
- char disp_test[]={ 0,0,0,0,0,0,0,0,
- 1,1,1,1,1,1,1,1,
- 1,1,1,0,0,1,1,0,
- 1,1,1,1,1,1,1,1 };
-
- /* Array used to calculate max size of displacements */
-
- char disp_size[]={ 4,1,2,0,4 };
-
- /* Parses a general operand into an addressingmode struct
-
- in: pointer at operand in ascii form
- pointer at addr_mode struct for result
- the level of recursion. (always 0 or 1)
-
- out: data in addr_mode struct
- */
- int addr_mode(operand,addr_modeP,recursive_level)
- char *operand;
- register addr_modeS *addr_modeP;
- int recursive_level;
- {
- register char *str;
- register int i;
- register int strl;
- register int mode;
- int j;
- mode = DEFAULT; /* default */
- addr_modeP->scaled_mode=0; /* why not */
- addr_modeP->scaled_reg=0; /* if 0, not scaled index */
- addr_modeP->float_flag=0;
- addr_modeP->am_size=0;
- addr_modeP->im_disp=0;
- addr_modeP->pcrel=0; /* not set in this function */
- addr_modeP->disp_suffix[0]=0;
- addr_modeP->disp_suffix[1]=0;
- addr_modeP->disp[0]=NULL;
- addr_modeP->disp[1]=NULL;
- str=operand;
- if (str[0]==0) {return (0);} /* we don't want this */
- strl=strlen(str);
- switch (str[0]) {
- /* the following three case statements controls the mode-chars
- this is the place to ed if you want to change them */
- #ifdef ABSOLUTE_PREFIX
- case ABSOLUTE_PREFIX:
- if (str[strl-1]==']') break;
- addr_modeP->mode=21; /* absolute */
- addr_modeP->disp[0]=str+1;
- return (-1);
- #endif
- #ifdef IMMEDIATE_PREFIX
- case IMMEDIATE_PREFIX:
- if (str[strl-1]==']') break;
- addr_modeP->mode=20; /* immediate */
- addr_modeP->disp[0]=str+1;
- return (-1);
- #endif
- case '.':
- if (str[strl-1]!=']') {
- switch (str[1]) {
- case'-':case'+':
- if (str[2]!='\000') {
- addr_modeP->mode=27; /* pc-relativ */
- addr_modeP->disp[0]=str+2;
- return (-1);
- }
- default:
- as_warn("Invalid syntax in PC-relative addressing mode");
- return(0);
- }
- }
- break;
- case'e':
- if (str[strl-1]!=']') {
- if((!strncmp(str,"ext(",4)) && strl>7) { /* external */
- addr_modeP->disp[0]=str+4;
- i=0;
- j=2;
- do { /* disp[0]'s termination point */
- j+=1;
- if (str[j]=='(') i++;
- if (str[j]==')') i--;
- } while (j<strl && i!=0);
- if (i!=0 || !(str[j+1]=='-' || str[j+1]=='+') ) {
- as_warn("Invalid syntax in External addressing mode");
- return(0);
- }
- str[j]='\000'; /* null terminate disp[0] */
- addr_modeP->disp[1]=str+j+2;
- addr_modeP->mode=22;
- return (-1);
- }
- }
- break;
- default:;
- }
- strl=strlen(str);
- switch(strl) {
- case 2:
- switch (str[0]) {
- case'f':addr_modeP->float_flag=1;
- case'r':
- if (str[1]>='0' && str[1]<'8') {
- addr_modeP->mode=str[1]-'0';
- return (-1);
- }
- }
- case 3:
- if (!strncmp(str,"tos",3)) {
- addr_modeP->mode=23; /* TopOfStack */
- return (-1);
- }
- default:;
- }
- if (strl>4) {
- if (str[strl-1]==')') {
- if (str[strl-2]==')') {
- if (!strncmp(&str[strl-5],"(fp",3)) {
- mode=16; /* Memory Relative */
- }
- if (!strncmp(&str[strl-5],"(sp",3)) {
- mode=17;
- }
- if (!strncmp(&str[strl-5],"(sb",3)) {
- mode=18;
- }
- if (mode!=DEFAULT) { /* memory relative */
- addr_modeP->mode=mode;
- j=strl-5; /* temp for end of disp[0] */
- i=0;
- do {
- strl-=1;
- if (str[strl]==')') i++;
- if (str[strl]=='(') i--;
- } while (strl>-1 && i!=0);
- if (i!=0) {
- as_warn("Invalid syntax in Memory Relative addressing mode");
- return(0);
- }
- addr_modeP->disp[1]=str;
- addr_modeP->disp[0]=str+strl+1;
- str[j]='\000'; /* null terminate disp[0] */
- str[strl]='\000'; /* null terminate disp[1] */
- return (-1);
- }
- }
- switch (str[strl-3]) {
- case'r':case'R':
- if (str[strl-2]>='0' && str[strl-2]<'8' && str[strl-4]=='(') {
- addr_modeP->mode=str[strl-2]-'0'+8;
- addr_modeP->disp[0]=str;
- str[strl-4]=0;
- return (-1); /* reg rel */
- }
- default:
- if (!strncmp(&str[strl-4],"(fp",3)) {
- mode=24;
- }
- if (!strncmp(&str[strl-4],"(sp",3)) {
- mode=25;
- }
- if (!strncmp(&str[strl-4],"(sb",3)) {
- mode=26;
- }
- if (!strncmp(&str[strl-4],"(pc",3)) {
- mode=27;
- }
- if (mode!=DEFAULT) {
- addr_modeP->mode=mode;
- addr_modeP->disp[0]=str;
- str[strl-4]='\0';
- return (-1); /* memory space */
- }
- }
- }
- /* no trailing ')' do we have a ']' ? */
- if (str[strl-1]==']') {
- switch (str[strl-2]) {
- case'b':mode=28;break;
- case'w':mode=29;break;
- case'd':mode=30;break;
- case'q':mode=31;break;
- default:;
- as_warn("Invalid scaled-indexed mode, use (b,w,d,q)");
- if (str[strl-3]!=':' || str[strl-6]!='[' ||
- str[strl-5]=='r' || str[strl-4]<'0' || str[strl-4]>'7') {
- as_warn("Syntax in scaled-indexed mode, use [Rn:m] where n=[0..7] m={b,w,d,q}");
- }
- } /* scaled index */
- {
- if (recursive_level>0) {
- as_warn("Scaled-indexed addressing mode combined with scaled-index");
- return(0);
- }
- addr_modeP->am_size+=1; /* scaled index byte */
- j=str[strl-4]-'0'; /* store temporary */
- str[strl-6]='\000'; /* nullterminate for recursive call */
- i=addr_mode(str,addr_modeP,1);
- if (!i || addr_modeP->mode==20) {
- as_warn("Invalid or illegal addressing mode combined with scaled-index");
- return(0);
- }
- addr_modeP->scaled_mode=addr_modeP->mode; /* store the inferior mode */
- addr_modeP->mode=mode;
- addr_modeP->scaled_reg=j+1;
- return (-1);
- }
- }
- }
- addr_modeP->mode = DEFAULT; /* default to whatever */
- addr_modeP->disp[0]=str;
- return (-1);
- }
-
- /* ptr points at string
- addr_modeP points at struct with result
- This routine calls addr_mode to determine the general addr.mode of
- the operand. When this is ready it parses the displacements for size
- specifying suffixes and determines size of immediate mode via ns32k-opcode.
- Also builds index bytes if needed.
- */
- int get_addr_mode(ptr,addr_modeP)
- char *ptr;
- addr_modeS *addr_modeP;
- {
- int tmp;
- addr_mode(ptr,addr_modeP,0);
- if (addr_modeP->mode == DEFAULT || addr_modeP->scaled_mode == -1) {
- /* resolve ambigious operands, this shouldn't
- be necessary if one uses standard NSC operand
- syntax. But the sequent compiler doesn't!!!
- This finds a proper addressinging mode if it
- is implicitly stated. See ns32k-opcode.h */
- (void)evaluate_expr(&exprP,ptr); /* this call takes time Sigh! */
- if (addr_modeP->mode == DEFAULT) {
- if (exprP.X_add_symbol || exprP.X_subtract_symbol) {
- addr_modeP->mode=desc->default_model; /* we have a label */
- } else {
- addr_modeP->mode=desc->default_modec; /* we have a constant */
- }
- } else {
- if (exprP.X_add_symbol || exprP.X_subtract_symbol) {
- addr_modeP->scaled_mode=desc->default_model;
- } else {
- addr_modeP->scaled_mode=desc->default_modec;
- }
- }
- /* must put this mess down in addr_mode to handle the scaled case better */
- }
- /* It appears as the sequent compiler wants an absolute when we have a
- label without @. Constants becomes immediates besides the addr case.
- Think it does so with local labels too, not optimum, pcrel is better.
- When I have time I will make gas check this and select pcrel when possible
- Actually that is trivial.
- */
- if (tmp=addr_modeP->scaled_reg) { /* build indexbyte */
- tmp--; /* remember regnumber comes incremented for flagpurpose */
- tmp|=addr_modeP->scaled_mode<<3;
- addr_modeP->index_byte=(char)tmp;
- addr_modeP->am_size+=1;
- }
- if (disp_test[addr_modeP->mode]) { /* there was a displacement, probe for length specifying suffix*/
- {
- register char c;
- register char suffix;
- register char suffix_sub;
- register int i;
- register char *toP;
- register char *fromP;
-
- addr_modeP->pcrel=0;
- if (disp_test[addr_modeP->mode]) { /* there is a displacement */
- if (addr_modeP->mode==27 || addr_modeP->scaled_mode==27) { /* do we have pcrel. mode */
- addr_modeP->pcrel=1;
- }
- addr_modeP->im_disp=1;
- for(i=0;i<2;i++) {
- suffix_sub=suffix=0;
- if (toP=addr_modeP->disp[i]) { /* suffix of expression, the largest size rules */
- fromP=toP;
- while (c = *fromP++) {
- *toP++=c;
- if (c==':') {
- switch (*fromP) {
- case '\0':
- as_warn("Premature end of suffix--Defaulting to d");
- suffix=4;
- continue;
- case 'b':suffix_sub=1;break;
- case 'w':suffix_sub=2;break;
- case 'd':suffix_sub=4;break;
- default:
- as_warn("Bad suffix after ':' use {b|w|d} Defaulting to d");
- suffix=4;
- }
- fromP++;
- toP--; /* So we write over the ':' */
- if (suffix<suffix_sub) suffix=suffix_sub;
- }
- }
- *toP='\0'; /* terminate properly */
- addr_modeP->disp_suffix[i]=suffix;
- addr_modeP->am_size+=suffix ? suffix : 4;
- }
- }
- }
- }
- } else {
- if (addr_modeP->mode==20) { /* look in ns32k_opcode for size */
- addr_modeP->disp_suffix[0]=addr_modeP->am_size=desc->im_size;
- addr_modeP->im_disp=0;
- }
- }
- return addr_modeP->mode;
- }
-
-
- /* read an optionlist */
- void optlist(str,optionP,default_map)
- char *str; /* the string to extract options from */
- struct option *optionP; /* how to search the string */
- unsigned long *default_map; /* default pattern and output */
- {
- register int i,j,k,strlen1,strlen2;
- register char *patternP,*strP;
- strlen1=strlen(str);
- if (strlen1<1) {
- as_fatal("Very short instr to option, ie you can't do it on a NULLstr");
- }
- for (i=0;optionP[i].pattern!=0;i++) {
- strlen2=strlen(optionP[i].pattern);
- for (j=0;j<strlen1;j++) {
- patternP=optionP[i].pattern;
- strP = &str[j];
- for (k=0;k<strlen2;k++) {
- if (*(strP++)!=*(patternP++)) break;
- }
- if (k==strlen2) { /* match */
- *default_map|=optionP[i].or;
- *default_map&=optionP[i].and;
- }
- }
- }
- }
- /* search struct for symbols
- This function is used to get the short integer form of reg names
- in the instructions lmr, smr, lpr, spr
- return true if str is found in list */
-
- int list_search(str,optionP,default_map)
- char *str; /* the string to match */
- struct option *optionP; /* list to search */
- unsigned long *default_map; /* default pattern and output */
- {
- register int i;
- for (i=0;optionP[i].pattern!=0;i++) {
- if (!strncmp(optionP[i].pattern,str,20)) { /* use strncmp to be safe */
- *default_map|=optionP[i].or;
- *default_map&=optionP[i].and;
- return -1;
- }
- }
- as_warn("No such entry in list. (cpu/mmu register)");
- return 0;
- }
- segT evaluate_expr(resultP,ptr)
- expressionS *resultP;
- char *ptr;
- {
- register char *tmp_line;
- register segT segment;
- tmp_line=input_line_pointer;
- input_line_pointer=ptr;
- segment=expression(&exprP);
- input_line_pointer=tmp_line;
- return (segment);
- }
-
- /* Convert operands to iif-format and adds bitfields to the opcode.
- Operands are parsed in such an order that the opcode is updated from
- its most significant bit, that is when the operand need to alter the
- opcode.
- Be carefull not to put to objects in the same iif-slot.
- */
-
- encode_operand(argc,argv,operandsP,suffixP,im_size,opcode_bit_ptr)
- int argc;
- char **argv;
- char *operandsP;
- char *suffixP;
- char im_size;
- char opcode_bit_ptr;
- {
- register int i,j;
- int pcrel,tmp,b,loop,pcrel_adjust;
- for(loop=0;loop<argc;loop++) {
- i=operandsP[loop<<1]-'1'; /* what operand are we supposed to work on */
- if (i>3) as_fatal("Internal error check ns32k-opcode.h");
- pcrel=0;
- pcrel_adjust=0;
- tmp=0;
- switch (operandsP[(loop<<1)+1]) {
- case 'f': /* operand of sfsr turns out to be a nasty specialcase */
- opcode_bit_ptr-=5;
- case 'F': /* 32 bit float general form */
- case 'L': /* 64 bit float */
- case 'Q': /* quad-word */
- case 'B': /* byte */
- case 'W': /* word */
- case 'D': /* double-word */
- case 'A': /* double-word gen-address-form ie no regs allowed */
- get_addr_mode(argv[i],&addr_modeP);
- iif.instr_size+=addr_modeP.am_size;
- if (opcode_bit_ptr==desc->opcode_size) b=4; else b=6;
- for (j=b;j<(b+2);j++) {
- if (addr_modeP.disp[j-b]) {
- IIF(j,
- 2,
- addr_modeP.disp_suffix[j-b],
- (unsigned long)addr_modeP.disp[j-b],
- 0,
- addr_modeP.pcrel,
- iif.instr_size-addr_modeP.am_size, /* this aint used (now) */
- addr_modeP.im_disp,
- IND(BRANCH,BYTE),
- NULL,
- addr_modeP.scaled_reg ? addr_modeP.scaled_mode:addr_modeP.mode,
- 0);
- }
- }
- opcode_bit_ptr-=5;
- iif.iifP[1].object|=((long)addr_modeP.mode)<<opcode_bit_ptr;
- if (addr_modeP.scaled_reg) {
- j=b/2;
- IIF(j,1,1, (unsigned long)addr_modeP.index_byte,0,0,0,0,0, NULL,-1,0);
- }
- break;
- case 'b': /* multiple instruction disp */
- freeptr++; /* OVE:this is an useful hack */
- tmp=(int)sprintf(freeptr,"((%s-1)*%d)\000",argv[i],desc->im_size);
- argv[i]=freeptr;
- freeptr=(char*)tmp;
- pcrel-=1; /* make pcrel 0 inspite of what case 'p': wants */
- /* fall thru */
- case 'p': /* displacement - pc relative addressing */
- pcrel+=1;
- /* fall thru */
- case 'd': /* displacement */
- iif.instr_size+=suffixP[i] ? suffixP[i] : 4;
- IIF(12, 2, suffixP[i], (unsigned long)argv[i], 0,
- pcrel, pcrel_adjust, 1, IND(BRANCH,BYTE), NULL,-1,0);
- break;
- case 'H': /* sequent-hack: the linker wants a bit set when bsr */
- pcrel=1;
- iif.instr_size+=suffixP[i] ? suffixP[i] : 4;
- IIF(12, 2, suffixP[i], (unsigned long)argv[i], 0,
- pcrel, pcrel_adjust, 1, IND(BRANCH,BYTE), NULL,-1,1);break;
- case 'q': /* quick */
- opcode_bit_ptr-=4;
- IIF(11,2,42,(unsigned long)argv[i],0,0,0,0,0,
- bit_fix_new(4,opcode_bit_ptr,-8,7,0,1,0),-1,0);
- break;
- case 'r': /* register number (3 bits) */
- list_search(argv[i],opt6,&tmp);
- opcode_bit_ptr-=3;
- iif.iifP[1].object|=tmp<<opcode_bit_ptr;
- break;
- case 'O': /* setcfg instruction optionslist */
- optlist(argv[i],opt3,&tmp);
- opcode_bit_ptr-=4;
- iif.iifP[1].object|=tmp<<15;
- break;
- case 'C': /* cinv instruction optionslist */
- optlist(argv[i],opt4,&tmp);
- opcode_bit_ptr-=4;
- iif.iifP[1].object|=tmp<<15;/*insert the regtype in opcode */
- break;
- case 'S': /* stringinstruction optionslist */
- optlist(argv[i],opt5,&tmp);
- opcode_bit_ptr-=4;
- iif.iifP[1].object|=tmp<<15;
- break;
- case 'u':case 'U': /* registerlist */
- IIF(10,1,1,0,0,0,0,0,0,NULL,-1,0);
- switch (operandsP[(i<<1)+1]) {
- case 'u': /* restore, exit */
- optlist(argv[i],opt1,&iif.iifP[10].object);
- break;
- case 'U': /* save,enter */
- optlist(argv[i],opt2,&iif.iifP[10].object);
- break;
- }
- iif.instr_size+=1;
- break;
- case 'M': /* mmu register */
- list_search(argv[i],mmureg,&tmp);
- opcode_bit_ptr-=4;
- iif.iifP[1].object|=tmp<<opcode_bit_ptr;
- break;
- case 'P': /* cpu register */
- list_search(argv[i],cpureg,&tmp);
- opcode_bit_ptr-=4;
- iif.iifP[1].object|=tmp<<opcode_bit_ptr;
- break;
- case 'g': /* inss exts */
- iif.instr_size+=1; /* 1 byte is allocated after the opcode */
- IIF(10,2,1,
- (unsigned long)argv[i], /* i always 2 here */
- 0,0,0,0,0,
- bit_fix_new(3,5,0,7,0,0,0), /* a bit_fix is targeted to the byte */
- -1,0);
- case 'G':
- IIF(11,2,42,
- (unsigned long)argv[i], /* i always 3 here */
- 0,0,0,0,0,
- bit_fix_new(5,0,1,32,-1,0,-1),-1,0);
- break;
- case 'i':
- iif.instr_size+=1;
- b=2+i; /* put the extension byte after opcode */
- IIF(b,2,1,0,0,0,0,0,0,0,-1,0);
- default:
- as_fatal("Bad opcode-table-option, check in file ns32k-opcode.h");
- }
- }
- }
-
- /* in: instruction line
- out: internal structure of instruction
- that has been prepared for direct conversion to fragment(s) and
- fixes in a systematical fashion
- Return-value = recursive_level
- */
- /* build iif of one assembly text line */
- int parse(line,recursive_level)
- char *line;
- int recursive_level;
- {
- register char *lineptr,c,suffix_separator;
- register int i;
- int argc,arg_type;
- char sqr,sep;
- char suffix[MAX_ARGS],*argv[MAX_ARGS];/* no more than 4 operands */
- if (recursive_level<=0) { /* called from md_assemble */
- for (lineptr=line;(*lineptr)!='\0' && (*lineptr)!=' ';lineptr++);
- c = *lineptr;
- *lineptr='\0';
- if (!(desc=(struct ns32k_opcode*)hash_find(inst_hash_handle,line))) {
- as_fatal("No such opcode");
- }
- *lineptr=c;
- } else {
- lineptr=line;
- }
- argc=0;
- if (*desc->operands) {
- if (*lineptr++!='\0') {
- sqr='[';
- sep=',';
- while (*lineptr!='\0') {
- if (desc->operands[argc<<1]) {
- suffix[argc]=0;
- arg_type=desc->operands[(argc<<1)+1];
- switch (arg_type) {
- case 'd': case 'b': case 'p': case 'H': /* the operand is supposed to be a displacement */
- /* Hackwarning: do not forget to update the 4 cases above when editing ns32k-opcode.h */
- suffix_separator=':';
- break;
- default:
- suffix_separator='\255'; /* if this char occurs we loose */
- }
- suffix[argc]=0; /* 0 when no ':' is encountered */
- argv[argc]=freeptr;
- *freeptr='\0';
- while ((c = *lineptr)!='\0' && c!=sep) {
- if (c==sqr) {
- if (sqr=='[') {
- sqr=']';sep='\0';
- } else {
- sqr='[';sep=',';
- }
- }
- if (c==suffix_separator) { /* ':' - label/suffix separator */
- switch (lineptr[1]) {
- case 'b':suffix[argc]=1;break;
- case 'w':suffix[argc]=2;break;
- case 'd':suffix[argc]=4;break;
- default: as_warn("Bad suffix, defaulting to d");
- suffix[argc]=4;
- if (lineptr[1]=='\0' || lineptr[1]==sep) {
- lineptr+=1;
- continue;
- }
- }
- lineptr+=2;
- continue;
- }
- *freeptr++=c;
- lineptr++;
- }
- *freeptr++='\0';
- argc+=1;
- if (*lineptr=='\0') continue;
- lineptr+=1;
- } else {
- as_fatal("Too many operands passed to instruction");
- }
- }
- }
- }
- if (argc!=strlen(desc->operands)/2) {
- if (strlen(desc->default_args)) { /* we can apply default, dont goof */
- if (parse(desc->default_args,1)!=1) { /* check error in default */
- as_fatal("Wrong numbers of operands in default, check ns32k-opcodes.h");
- }
- } else {
- as_fatal("Wrong number of operands");
- }
-
- }
- for (i=0;i<IIF_ENTRIES;i++) {
- iif.iifP[i].type=0; /* mark all entries as void*/
- }
-
- /* build opcode iif-entry */
- iif.instr_size=desc->opcode_size/8;
- IIF(1,1,iif.instr_size,desc->opcode_seed,0,0,0,0,0,0,-1,0);
-
- /* this call encodes operands to iif format */
- if (argc) {
- encode_operand(argc,
- argv,
- &desc->operands[0],
- &suffix[0],
- desc->im_size,
- desc->opcode_size);
- }
- return recursive_level;
- }
-
-
- /* Convert iif to fragments.
- From this point we start to dribble with functions in other files than
- this one.(Except hash.c) So, if it's possible to make an iif for an other
- CPU, you don't need to know what frags, relax, obstacks, etc is in order
- to port this assembler. You only need to know if it's possible to reduce
- your cpu-instruction to iif-format (takes some work) and adopt the other
- md_? parts according to given instructions
- Note that iif was invented for the clean ns32k`s architecure.
- */
- convert_iif()
- {
- register int i,j;
- fragS *inst_frag;
- char *inst_offset,*inst_opcode;
- char *memP;
- segT segment;
- int l,k;
- register int rem_size; /* count the remaining bytes of instruction */
- register char type;
- register char size = 0;
- int size_so_far=0; /* used to calculate pcrel_adjust */
-
- rem_size=iif.instr_size;
- memP=frag_more(iif.instr_size); /* make sure we have enough bytes for instruction */
- inst_opcode=memP;
- inst_offset=(char*)(memP-frag_now->fr_literal);
- inst_frag=frag_now;
- for (i=0;i<IIF_ENTRIES;i++) {
- if (type=iif.iifP[i].type) { /* the object exist, so handle it */
- switch (size=iif.iifP[i].size) {
- case 42: size=0; /* it's a bitfix that operates on an existing object*/
- if (iif.iifP[i].bit_fixP->fx_bit_base) { /* expand fx_bit_base to point at opcode */
- iif.iifP[i].bit_fixP->fx_bit_base=(long)inst_opcode;
- }
- case 8: /* bignum or doublefloat */
- bzero (memP,8);
- case 1:case 2:case 3:case 4:/* the final size in objectmemory is known */
- j=(unsigned long)iif.iifP[i].bit_fixP;
- switch (type) {
- case 1: /* the object is pure binary */
- if (j || iif.iifP[i].pcrel) {
- fix_new_ns32k(frag_now,
- (long)(memP-frag_now->fr_literal),
- size,
- 0,
- 0,
- iif.iifP[i].object,
- iif.iifP[i].pcrel,
- (char)size_so_far, /*iif.iifP[i].pcrel_adjust,*/
- iif.iifP[i].im_disp,
- j,
- iif.iifP[i].bsr); /* sequent hack */
- } else { /* good, just put them bytes out */
- switch (iif.iifP[i].im_disp) {
- case 0:
- md_number_to_chars(memP,iif.iifP[i].object,size);break;
- case 1:
- md_number_to_disp(memP,iif.iifP[i].object,size);break;
- default: as_fatal("iif convert internal pcrel/binary");
- }
- }
- memP+=size;
- rem_size-=size;
- break;
- case 2: /* the object is a pointer at an expression, so unpack
- it, note that bignums may result from the expression
- */
- if ((segment=evaluate_expr(&exprP,(char*)iif.iifP[i].object))==SEG_BIG || size==8) {
- if ((k=exprP.X_add_number)>0) { /* we have a bignum ie a quad */
- /* this can only happens in a long suffixed instruction */
- bzero(memP,size); /* size normally is 8 */
- if (k*2>size) as_warn("Bignum too big for long");
- if (k==3) memP+=2;
- for (l=0;k>0;k--,l+=2) {
- md_number_to_chars(memP+l,generic_bignum[l>>1],sizeof(LITTLENUM_TYPE));
- }
- } else { /* flonum */
- LITTLENUM_TYPE words[4];
-
- switch(size) {
- case 4:
- gen_to_words(words,2,8);
- md_number_to_imm(memP ,(long)words[0],sizeof(LITTLENUM_TYPE));
- md_number_to_imm(memP+sizeof(LITTLENUM_TYPE),(long)words[1],sizeof(LITTLENUM_TYPE));
- break;
- case 8:
- gen_to_words(words,4,11);
- md_number_to_imm(memP ,(long)words[0],sizeof(LITTLENUM_TYPE));
- md_number_to_imm(memP+sizeof(LITTLENUM_TYPE) ,(long)words[1],sizeof(LITTLENUM_TYPE));
- md_number_to_imm(memP+2*sizeof(LITTLENUM_TYPE),(long)words[2],sizeof(LITTLENUM_TYPE));
- md_number_to_imm(memP+3*sizeof(LITTLENUM_TYPE),(long)words[3],sizeof(LITTLENUM_TYPE));
- break;
- }
- }
- memP+=size;
- rem_size-=size;
- break;
- }
- if (j ||
- exprP.X_add_symbol ||
- exprP.X_subtract_symbol ||
- iif.iifP[i].pcrel) { /* fixit */
- /* the expression was undefined due to an undefined label */
- /* create a fix so we can fix the object later */
- exprP.X_add_number+=iif.iifP[i].object_adjust;
- fix_new_ns32k(frag_now,
- (long)(memP-frag_now->fr_literal),
- size,
- exprP.X_add_symbol,
- exprP.X_subtract_symbol,
- exprP.X_add_number,
- iif.iifP[i].pcrel,
- (char)size_so_far, /*iif.iifP[i].pcrel_adjust,*/
- iif.iifP[i].im_disp,
- j,
- iif.iifP[i].bsr); /* sequent hack */
-
- } else { /* good, just put them bytes out */
- switch (iif.iifP[i].im_disp) {
- case 0:
- md_number_to_imm(memP,exprP.X_add_number,size);break;
- case 1:
- md_number_to_disp(memP,exprP.X_add_number,size);break;
- default: as_fatal("iif convert internal pcrel/pointer");
- }
- }
- memP+=size;
- rem_size-=size;
- break;
- default: as_fatal("Internal logic error in iif.iifP[n].type");
- }
- break;
- case 0: /* To bad, the object may be undefined as far as its final
- nsize in object memory is concerned. The size of the object
- in objectmemory is not explicitly given.
- If the object is defined its length can be determined and
- a fix can replace the frag.
- */
- {
- int temp;
- segment=evaluate_expr(&exprP,(char*)iif.iifP[i].object);
- if ((exprP.X_add_symbol || exprP.X_subtract_symbol) &&
- !iif.iifP[i].pcrel) { /* OVE: hack, clamp to 4 bytes */
- size=4; /* we dont wan't to frag this, use 4 so it reaches */
- fix_new_ns32k(frag_now,
- (long)(memP-frag_now->fr_literal),
- size,
- exprP.X_add_symbol,
- exprP.X_subtract_symbol,
- exprP.X_add_number,
- 0, /* never iif.iifP[i].pcrel, */
- (char)size_so_far, /*iif.iifP[i].pcrel_adjust,*/
- 1, /* always iif.iifP[i].im_disp, */
- 0,0);
- memP+=size;
- rem_size-=4;
- break; /* exit this absolute hack */
- }
-
- if (exprP.X_add_symbol || exprP.X_subtract_symbol) { /* frag it */
- if (exprP.X_subtract_symbol) { /* We cant relax this case */
- as_fatal("Can't relax difference");
- }
- else {
- /* at this stage we must undo some of the effect caused
- by frag_more, ie we must make sure that frag_var causes
- frag_new to creat a valid fix-size in the frag it`s closing
- */
- temp = -(rem_size-4);
- obstack_blank_fast(&frags,temp);
- /* we rewind none, some or all of the requested size we
- requested by the first frag_more for this iif chunk.
- Note: that we allocate 4 bytes to an object we NOT YET
- know the size of, thus rem_size-4.
- */
- (void)frag_variant(rs_machine_dependent,
- 4,
- 0,
- IND(BRANCH,UNDEF), /* expecting the worst */
- exprP.X_add_symbol,
- exprP.X_add_number,
- (char*)inst_opcode,
- (char)size_so_far, /*iif.iifP[i].pcrel_adjust);*/
- iif.iifP[i].bsr); /* sequent linker hack */
- rem_size-=4;
- if (rem_size>0) {
- memP=frag_more(rem_size);
- }
- }
- }
- else {/* Double work, this is done in md_number_to_disp */
- exprP.X_add_number;
- if (-64<=exprP.X_add_number && exprP.X_add_number<=63) {
- size=1;
- } else {
- if (-8192<=exprP.X_add_number && exprP.X_add_number<=8191) {
- size=2;
- } else {
- if (-0x1f000000<=exprP.X_add_number &&
- exprP.X_add_number<=0x1fffffff)
- /* if (-0x40000000<=exprP.X_add_number &&
- exprP.X_add_number<=0x3fffffff) */
- {
- size=4;
- } else {
- as_warn("Displacement to large for :d");
- size=4;
- }
- }
- }
- /* rewind the bytes not used */
- temp = -(4-size);
- md_number_to_disp(memP,exprP.X_add_number,size);
- obstack_blank_fast(&frags,temp);
- memP+=size;
- rem_size-=4; /* we allocated this amount */
- }
- }
- break;
- default:
- as_fatal("Internal logic error in iif.iifP[].type");
- }
- size_so_far+=size;
- size=0;
- }
- }
- }
-
- void md_assemble(line)
- char *line;
- {
- freeptr=freeptr_static;
- parse(line,0); /* explode line to more fix form in iif */
- convert_iif(); /* convert iif to frags, fix's etc */
- #ifdef SHOW_NUM
- printf(" \t\t\t%s\n",line);
- #endif
- }
-
-
- void md_begin()
- {
- /* build a hashtable of the instructions */
- register struct ns32k_opcode *ptr;
- register char *stat;
- inst_hash_handle=hash_new();
- for (ptr=ns32k_opcodes;ptr<endop;ptr++) {
- if (*(stat=hash_insert(inst_hash_handle,ptr->name,(char*)ptr))) {
- as_fatal("Can't hash %s: %s",ptr->name,stat); /*fatal*/
- exit(0);
- }
- }
- freeptr_static=(char*)malloc(PRIVATE_SIZE); /* some private space please! */
- }
-
-
- void
- md_end()
- {
- free(freeptr_static);
- }
-
- /* Must be equal to MAX_PRECISON in atof-ieee.c */
- #define MAX_LITTLENUMS 6
-
- /* Turn the string pointed to by litP into a floating point constant of type
- type, and emit the appropriate bytes. The number of LITTLENUMS emitted
- is stored in *sizeP . An error message is returned, or NULL on OK.
- */
- char *
- md_atof(type,litP,sizeP)
- char type;
- char *litP;
- int *sizeP;
- {
- int prec;
- LITTLENUM_TYPE words[MAX_LITTLENUMS];
- LITTLENUM_TYPE *wordP;
- char *t;
- char *atof_ieee();
-
- switch(type) {
- case 'f':
- prec = 2;
- break;
-
- case 'd':
- prec = 4;
- break;
- default:
- *sizeP=0;
- return "Bad call to MD_ATOF()";
- }
- t=atof_ieee(input_line_pointer,type,words);
- if(t)
- input_line_pointer=t;
-
- *sizeP=prec * sizeof(LITTLENUM_TYPE);
- for(wordP=words+prec;prec--;) {
- md_number_to_chars(litP,(long)(*--wordP),sizeof(LITTLENUM_TYPE));
- litP+=sizeof(LITTLENUM_TYPE);
- }
- return ""; /* Someone should teach Dean about null pointers */
- }
-
- /* Convert number to chars in correct order */
-
- void
- md_number_to_chars (buf, value, nbytes)
- char *buf;
- long int value;
- int nbytes;
- {
- while (nbytes--)
- {
- #ifdef SHOW_NUM
- printf("%x ",value & 0xff);
- #endif
- *buf++ = value; /* Lint wants & MASK_CHAR. */
- value >>= BITS_PER_CHAR;
- }
- }
- /* Convert number to chars in correct order */
-
-
-
- /* This is a variant of md_numbers_to_chars. The reason for its' existence
- is the fact that ns32k uses Huffman coded displacements. This implies
- that the bit order is reversed in displacements and that they are prefixed
- with a size-tag.
-
- binary: msb -> lsb 0xxxxxxx byte
- 10xxxxxx xxxxxxxx word
- 11xxxxxx xxxxxxxx xxxxxxxx xxxxxxxx double word
-
- This must be taken care of and we do it here!
- */
- void md_number_to_disp(buf,val,n)
- char *buf;
- long val;
- char n;
- {
- switch(n) {
- case 1:
- if (val < -64 || val > 63)
- as_warn("Byte displacement out of range. line number not valid");
- val&=0x7f;
- #ifdef SHOW_NUM
- printf("%x ",val & 0xff);
- #endif
- *buf++=val;
- break;
- case 2:
- if (val < -8192 || val > 8191)
- as_warn("Word displacement out of range. line number not valid");
- val&=0x3fff;
- val|=0x8000;
- #ifdef SHOW_NUM
- printf("%x ",val>>8 & 0xff);
- #endif
- *buf++=(val>>8);
- #ifdef SHOW_NUM
- printf("%x ",val & 0xff);
- #endif
- *buf++=val;
- break;
- case 4:
- if (val < -0x1f000000 || val >= 0x20000000)
- /* if (val < -0x20000000 || val >= 0x20000000) */
- as_warn("Double word displacement out of range");
- val|=0xc0000000;
- #ifdef SHOW_NUM
- printf("%x ",val>>24 & 0xff);
- #endif
- *buf++=(val>>24);
- #ifdef SHOW_NUM
- printf("%x ",val>>16 & 0xff);
- #endif
- *buf++=(val>>16);
- #ifdef SHOW_NUM
- printf("%x ",val>>8 & 0xff);
- #endif
- *buf++=(val>>8);
- #ifdef SHOW_NUM
- printf("%x ",val & 0xff);
- #endif
- *buf++=val;
- break;
- default:
- as_fatal("Internal logic error");
- }
- }
- void md_number_to_imm(buf,val,n)
- char *buf;
- long val;
- char n;
- {
- switch(n) {
- case 1:
- #ifdef SHOW_NUM
- printf("%x ",val & 0xff);
- #endif
- *buf++=val;
- break;
- case 2:
- #ifdef SHOW_NUM
- printf("%x ",val>>8 & 0xff);
- #endif
- *buf++=(val>>8);
- #ifdef SHOW_NUM
- printf("%x ",val & 0xff);
- #endif
- *buf++=val;
- break;
- case 4:
- #ifdef SHOW_NUM
- printf("%x ",val>>24 & 0xff);
- #endif
- *buf++=(val>>24);
- #ifdef SHOW_NUM
- printf("%x ",val>>16 & 0xff);
- #endif
- *buf++=(val>>16);
- #ifdef SHOW_NUM
- printf("%x ",val>>8 & 0xff);
- #endif
- *buf++=(val>>8);
- #ifdef SHOW_NUM
- printf("%x ",val & 0xff);
- #endif
- *buf++=val;
- break;
- default:
- as_fatal("Internal logic error");
- }
- }
- /* the bit-field entries in the relocation_info struct plays hell
- with the byte-order problems of cross-assembly. So as a hack,
- I added this mach. dependent ri twiddler. Ugly, but it gets
- you there. -KWK */
- /* OVE: on a ns32k the twiddling continues at an even deeper level
- here we have to distinguish between displacements and immediates.
-
- The sequent has a bit for this. It also has a bit for relocobjects that
- points at the target for a bsr (BranchSubRoutine) !?!?!?!
-
- Using [] is importable but fast!! still, its rather funny :-)
- This md_ri.... is tailored for sequent.
- */
-
- void md_ri_to_chars(ri_p, ri)
- struct relocation_info *ri_p, ri;
- {
- if (ri.r_bsr) {ri.r_pcrel=0;} /* sequent seems to want this */
- md_number_to_chars((char*)ri_p, ri.r_address, sizeof(ri.r_address));
- md_number_to_chars((char*)ri_p+4,
- (long)(ri.r_symbolnum ) |
- (long)(ri.r_pcrel << 24 ) |
- (long)(ri.r_length << 25 ) |
- (long)(ri.r_extern << 27 ) |
- (long)(ri.r_bsr << 28 ) |
- (long)(ri.r_disp << 29 ),
- 4);
- /* the first and second md_number_to_chars never overlaps (32bit cpu case) */
- }
-
- /* fast bitfiddling support */
- /* mask used to zero bitfield before oring in the true field */
-
- static unsigned long l_mask[]={ 0xffffffff, 0xfffffffe, 0xfffffffc, 0xfffffff8,
- 0xfffffff0, 0xffffffe0, 0xffffffc0, 0xffffff80,
- 0xffffff00, 0xfffffe00, 0xfffffc00, 0xfffff800,
- 0xfffff000, 0xffffe000, 0xffffc000, 0xffff8000,
- 0xffff0000, 0xfffe0000, 0xfffc0000, 0xfff80000,
- 0xfff00000, 0xffe00000, 0xffc00000, 0xff800000,
- 0xff000000, 0xfe000000, 0xfc000000, 0xf8000000,
- 0xf0000000, 0xe0000000, 0xc0000000, 0x80000000,
- };
- static unsigned long r_mask[]={ 0x00000000, 0x00000001, 0x00000003, 0x00000007,
- 0x0000000f, 0x0000001f, 0x0000003f, 0x0000007f,
- 0x000000ff, 0x000001ff, 0x000003ff, 0x000007ff,
- 0x00000fff, 0x00001fff, 0x00003fff, 0x00007fff,
- 0x0000ffff, 0x0001ffff, 0x0003ffff, 0x0007ffff,
- 0x000fffff, 0x001fffff, 0x003fffff, 0x007fffff,
- 0x00ffffff, 0x01ffffff, 0x03ffffff, 0x07ffffff,
- 0x0fffffff, 0x1fffffff, 0x3fffffff, 0x7fffffff,
- };
- #define MASK_BITS 31
- /* Insert bitfield described by field_ptr and val at buf
- This routine is written for modification of the first 4 bytes pointed
- to by buf, to yield speed.
- The ifdef stuff is for selection between a ns32k-dependent routine
- and a general version. (My advice: use the general version!)
- */
-
- void md_number_to_field(buf,val,field_ptr)
- register char *buf;
- register long val;
- register bit_fixS *field_ptr;
- {
- register unsigned long object;
- register unsigned long mask;
- /* define ENDIAN on a ns32k machine */
- #ifdef ENDIAN
- register unsigned long *mem_ptr;
- #else
- register char *mem_ptr;
- #endif
- if (field_ptr->fx_bit_min<=val && val<=field_ptr->fx_bit_max) {
- #ifdef ENDIAN
- if (field_ptr->fx_bit_base) { /* override buf */
- mem_ptr=(unsigned long*)field_ptr->fx_bit_base;
- } else {
- mem_ptr=(unsigned long*)buf;
- }
- #else
- if (field_ptr->fx_bit_base) { /* override buf */
- mem_ptr=(char*)field_ptr->fx_bit_base;
- } else {
- mem_ptr=buf;
- }
- #endif
- mem_ptr+=field_ptr->fx_bit_base_adj;
- #ifdef ENDIAN /* we have a nice ns32k machine with lowbyte at low-physical mem */
- object = *mem_ptr; /* get some bytes */
- #else /* OVE Goof! the machine is a m68k or dito */
- /* That takes more byte fiddling */
- object=0;
- object|=mem_ptr[3] & 0xff;
- object<<=8;
- object|=mem_ptr[2] & 0xff;
- object<<=8;
- object|=mem_ptr[1] & 0xff;
- object<<=8;
- object|=mem_ptr[0] & 0xff;
- #endif
- mask=0;
- mask|=(r_mask[field_ptr->fx_bit_offset]);
- mask|=(l_mask[field_ptr->fx_bit_offset+field_ptr->fx_bit_size]);
- object&=mask;
- val+=field_ptr->fx_bit_add;
- object|=((val<<field_ptr->fx_bit_offset) & (mask ^ 0xffffffff));
- #ifdef ENDIAN
- *mem_ptr=object;
- #else
- mem_ptr[0]=(char)object;
- object>>=8;
- mem_ptr[1]=(char)object;
- object>>=8;
- mem_ptr[2]=(char)object;
- object>>=8;
- mem_ptr[3]=(char)object;
- #endif
- } else {
- as_warn("Bit field out of range");
- }
- }
-
- /* Convert a relaxed displacement to dito in final output */
-
- void
- md_convert_frag(fragP)
- register fragS *fragP;
- {
- long disp;
- long ext;
-
- /* Address in gas core of the place to store the displacement. */
- register char *buffer_address = fragP -> fr_fix + fragP -> fr_literal;
- /* Address in object code of the displacement. */
- register int object_address = fragP -> fr_fix + fragP -> fr_address;
-
- know(fragP->fr_symbol);
-
- /* The displacement of the address, from current location. */
- disp = (fragP->fr_symbol->sy_value + fragP->fr_offset) - object_address;
- disp+= fragP->fr_pcrel_adjust;
-
- switch(fragP->fr_subtype) {
- case IND(BRANCH,BYTE):
- ext=1;
- break;
- case IND(BRANCH,WORD):
- ext=2;
- break;
- case IND(BRANCH,DOUBLE):
- ext=4;
- break;
- }
- if(ext) {
- md_number_to_disp(buffer_address,(long)disp,(int)ext);
- fragP->fr_fix+=ext;
- }
- }
-
-
-
- /* This function returns the estimated size a variable object will occupy,
- one can say that we tries to guess the size of the objects before we
- actually know it */
-
- md_estimate_size_before_relax(fragP,segtype)
- register fragS *fragP;
- {
- int old_fix;
- old_fix=fragP->fr_fix;
- switch(fragP->fr_subtype) {
- case IND(BRANCH,UNDEF):
- if((fragP->fr_symbol->sy_type&N_TYPE)==segtype) {
- /* the symbol has been assigned a value */
- fragP->fr_subtype=IND(BRANCH,BYTE);
- } else {
- /* we don't relax symbols defined in an other segment
- the thing to do is to assume the object will occupy 4 bytes */
- fix_new_ns32k(fragP,
- (int)(fragP->fr_fix),
- 4,
- fragP->fr_symbol,
- (symbolS *)0,
- fragP->fr_offset,
- 1,
- fragP->fr_pcrel_adjust,
- 1,
- 0,
- fragP->fr_bsr); /*sequent hack */
- fragP->fr_fix+=4;
- /* fragP->fr_opcode[1]=0xff; */
- frag_wane(fragP);
- break;
- }
- case IND(BRANCH,BYTE):
- fragP->fr_var+=1;
- break;
- default:
- break;
- }
- return fragP->fr_var + fragP->fr_fix - old_fix;
- }
-
- int md_short_jump_size = 3;
- int md_long_jump_size = 5;
-
- void
- md_create_short_jump(ptr,from_addr,to_addr,frag,to_symbol)
- char *ptr;
- long from_addr,
- to_addr;
- fragS *frag;
- symbolS *to_symbol;
- {
- long offset;
-
- offset = to_addr - from_addr;
- md_number_to_chars(ptr, (long)0xEA ,1);
- md_number_to_disp(ptr+1,(long)offset,2);
- }
-
- void
- md_create_long_jump(ptr,from_addr,to_addr,frag,to_symbol)
- char *ptr;
- long from_addr,
- to_addr;
- fragS *frag;
- symbolS *to_symbol;
- {
- long offset;
-
- offset= to_addr - from_addr;
- md_number_to_chars(ptr, (long)0xEA, 2);
- md_number_to_disp(ptr+2,(long)offset,4);
- }
-
- /* JF this is a new function to parse machine-dep options */
- int
- md_parse_option(argP,cntP,vecP)
- char **argP;
- int *cntP;
- char ***vecP;
- {
- switch(**argP) {
- case 'm':
- (*argP)++;
-
- if(!strcmp(*argP,"32032")) {
- cpureg = cpureg_032;
- mmureg = mmureg_032;
- } else if(!strcmp(*argP, "32532")) {
- cpureg = cpureg_532;
- mmureg = mmureg_532;
- } else
- as_warn("Unknown -m option ignored");
-
- while(**argP)
- (*argP)++;
- break;
-
- default:
- return 0;
- }
- return 1;
- }
-
- /*
- * bit_fix_new()
- *
- * Create a bit_fixS in obstack 'notes'.
- * This struct is used to profile the normal fix. If the bit_fixP is a
- * valid pointer (not NULL) the bit_fix data will be used to format the fix.
- */
- bit_fixS *
- bit_fix_new (size,offset,min,max,add,base_type,base_adj)
- char size; /* Length of bitfield */
- char offset; /* Bit offset to bitfield */
- long base_type; /* 0 or 1, if 1 it's exploded to opcode ptr */
- long base_adj;
- long min; /* Signextended min for bitfield */
- long max; /* Signextended max for bitfield */
- long add; /* Add mask, used for huffman prefix */
- {
- register bit_fixS * bit_fixP;
-
- bit_fixP = (bit_fixS *)obstack_alloc(¬es,sizeof(bit_fixS));
-
- bit_fixP -> fx_bit_size = size;
- bit_fixP -> fx_bit_offset = offset;
- bit_fixP -> fx_bit_base = base_type;
- bit_fixP -> fx_bit_base_adj = base_adj;
- bit_fixP -> fx_bit_max = max;
- bit_fixP -> fx_bit_min = min;
- bit_fixP -> fx_bit_add = add;
-
- return bit_fixP;
- }
-
- void
- fix_new_ns32k (frag, where, size, add_symbol, sub_symbol, offset, pcrel,
- pcrel_adjust, im_disp, bit_fixP, bsr)
- fragS * frag; /* Which frag? */
- int where; /* Where in that frag? */
- short int size; /* 1, 2 or 4 usually. */
- symbolS * add_symbol; /* X_add_symbol. */
- symbolS * sub_symbol; /* X_subtract_symbol. */
- long int offset; /* X_add_number. */
- int pcrel; /* TRUE if PC-relative relocation. */
- char pcrel_adjust; /* not zero if adjustment of pcrel offset is needed */
- char im_disp; /* true if the value to write is a displacement */
- bit_fixS *bit_fixP; /* pointer at struct of bit_fix's, ignored if NULL */
- char bsr; /* sequent-linker-hack: 1 when relocobject is a bsr */
-
- {
- register fixS * fixP;
-
- fixP = (fixS *)obstack_alloc(¬es,sizeof(fixS));
- fixP -> fx_frag = frag;
- fixP -> fx_where = where;
- fixP -> fx_size = size;
- fixP -> fx_addsy = add_symbol;
- fixP -> fx_subsy = sub_symbol;
- fixP -> fx_offset = offset;
- fixP -> fx_pcrel = pcrel;
- fixP -> fx_pcrel_adjust = pcrel_adjust;
- fixP -> fx_im_disp = im_disp;
- fixP -> fx_bit_fixP = bit_fixP;
- fixP -> fx_bsr = bsr;
- fixP -> fx_next = * seg_fix_rootP;
-
- * seg_fix_rootP = fixP;
- }
-